Bump NuGet.Common from 6.11.1 to 6.12.1 (#155)

Bumps [NuGet.Common](https://github.com/NuGet/NuGet.Client) from 6.11.1 to 6.12.1.
- [Release notes](https://github.com/NuGet/NuGet.Client/releases)
- [Commits](https://github.com/NuGet/NuGet.Client/commits)

---
updated-dependencies:
- dependency-name: NuGet.Common
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

src/Aviationexam.GeneratedJsonConverters.SourceGenerator.Tests/Aviationexam.GeneratedJsonConverters.SourceGenerator.Tests.csproj

@@ -15,7 +15,7 @@
     <PackageReference Include="Microsoft.CodeAnalysis.Analyzers" Version="3.11.0" PrivateAssets="all" />
     <PackageReference Include="Microsoft.CodeAnalysis.CSharp.Workspaces" Version="4.11.0" PrivateAssets="all" />
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.11.1" />
-    <PackageReference Include="NuGet.Common" Version="6.11.1" />
+    <PackageReference Include="NuGet.Common" Version="6.12.1" />
     <PackageReference Include="NuGet.Packaging" Version="6.11.1" />
     <PackageReference Include="NuGet.Protocol" Version="6.11.1" />
     <PackageReference Include="System.ComponentModel.Annotations" Version="5.0.0" />